Beacon not updating.

For some weird reason this beacon doesn't update when using / setblock (Location in beam) stained_glass (data value).

It worked before, but for some reason it did not this time.

Edit: The beacon was glitched out.
It wasn't updating at all. I was able to break the beacon base and the beacon block without deactivating the beacon beam. Also, it wasn't updating when placing stained glass in the beam...